linux/drivers/gpu/drm/virtio/virtgpu_fence.c
Chris Wilson f54d186700 dma-buf: Rename struct fence to dma_fence
I plan to usurp the short name of struct fence for a core kernel struct,
and so I need to rename the specialised fence/timeline for DMA
operations to make room.

A consensus was reached in
https://lists.freedesktop.org/archives/dri-devel/2016-July/113083.html
that making clear this fence applies to DMA operations was a good thing.
Since then the patch has grown a bit as usage increases, so hopefully it
remains a good thing!

(v2...: rebase, rerun spatch)
v3: Compile on msm, spotted a manual fixup that I broke.
v4: Try again for msm, sorry Daniel

coccinelle script:
@@

@@
- struct fence
+ struct dma_fence
@@

@@
- struct fence_ops
+ struct dma_fence_ops
@@

@@
- struct fence_cb
+ struct dma_fence_cb
@@

@@
- struct fence_array
+ struct dma_fence_array
@@

@@
- enum fence_flag_bits
+ enum dma_fence_flag_bits
@@

@@
(
- fence_init
+ dma_fence_init
|
- fence_release
+ dma_fence_release
|
- fence_free
+ dma_fence_free
|
- fence_get
+ dma_fence_get
|
- fence_get_rcu
+ dma_fence_get_rcu
|
- fence_put
+ dma_fence_put
|
- fence_signal
+ dma_fence_signal
|
- fence_signal_locked
+ dma_fence_signal_locked
|
- fence_default_wait
+ dma_fence_default_wait
|
- fence_add_callback
+ dma_fence_add_callback
|
- fence_remove_callback
+ dma_fence_remove_callback
|
- fence_enable_sw_signaling
+ dma_fence_enable_sw_signaling
|
- fence_is_signaled_locked
+ dma_fence_is_signaled_locked
|
- fence_is_signaled
+ dma_fence_is_signaled
|
- fence_is_later
+ dma_fence_is_later
|
- fence_later
+ dma_fence_later
|
- fence_wait_timeout
+ dma_fence_wait_timeout
|
- fence_wait_any_timeout
+ dma_fence_wait_any_timeout
|
- fence_wait
+ dma_fence_wait
|
- fence_context_alloc
+ dma_fence_context_alloc
|
- fence_array_create
+ dma_fence_array_create
|
- to_fence_array
+ to_dma_fence_array
|
- fence_is_array
+ dma_fence_is_array
|
- trace_fence_emit
+ trace_dma_fence_emit
|
- FENCE_TRACE
+ DMA_FENCE_TRACE
|
- FENCE_WARN
+ DMA_FENCE_WARN
|
- FENCE_ERR
+ DMA_FENCE_ERR
)
 (
 ...
 )

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161025120045.28839-1-chris@chris-wilson.co.uk
2016-10-25 14:40:39 +02:00

120 lines
3.7 KiB
C

/*
* Copyright (C) 2015 Red Hat, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <drm/drmP.h>
#include "virtgpu_drv.h"
static const char *virtio_get_driver_name(struct dma_fence *f)
{
return "virtio_gpu";
}
static const char *virtio_get_timeline_name(struct dma_fence *f)
{
return "controlq";
}
static bool virtio_enable_signaling(struct dma_fence *f)
{
return true;
}
static bool virtio_signaled(struct dma_fence *f)
{
struct virtio_gpu_fence *fence = to_virtio_fence(f);
if (atomic64_read(&fence->drv->last_seq) >= fence->seq)
return true;
return false;
}
static void virtio_fence_value_str(struct dma_fence *f, char *str, int size)
{
struct virtio_gpu_fence *fence = to_virtio_fence(f);
snprintf(str, size, "%llu", fence->seq);
}
static void virtio_timeline_value_str(struct dma_fence *f, char *str, int size)
{
struct virtio_gpu_fence *fence = to_virtio_fence(f);
snprintf(str, size, "%llu", (u64)atomic64_read(&fence->drv->last_seq));
}
static const struct dma_fence_ops virtio_fence_ops = {
.get_driver_name = virtio_get_driver_name,
.get_timeline_name = virtio_get_timeline_name,
.enable_signaling = virtio_enable_signaling,
.signaled = virtio_signaled,
.wait = dma_fence_default_wait,
.fence_value_str = virtio_fence_value_str,
.timeline_value_str = virtio_timeline_value_str,
};
int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
struct virtio_gpu_ctrl_hdr *cmd_hdr,
struct virtio_gpu_fence **fence)
{
struct virtio_gpu_fence_driver *drv = &vgdev->fence_drv;
unsigned long irq_flags;
*fence = kmalloc(sizeof(struct virtio_gpu_fence), GFP_ATOMIC);
if ((*fence) == NULL)
return -ENOMEM;
spin_lock_irqsave(&drv->lock, irq_flags);
(*fence)->drv = drv;
(*fence)->seq = ++drv->sync_seq;
dma_fence_init(&(*fence)->f, &virtio_fence_ops, &drv->lock,
drv->context, (*fence)->seq);
dma_fence_get(&(*fence)->f);
list_add_tail(&(*fence)->node, &drv->fences);
spin_unlock_irqrestore(&drv->lock, irq_flags);
cmd_hdr->flags |= cpu_to_le32(VIRTIO_GPU_FLAG_FENCE);
cmd_hdr->fence_id = cpu_to_le64((*fence)->seq);
return 0;
}
void virtio_gpu_fence_event_process(struct virtio_gpu_device *vgdev,
u64 last_seq)
{
struct virtio_gpu_fence_driver *drv = &vgdev->fence_drv;
struct virtio_gpu_fence *fence, *tmp;
unsigned long irq_flags;
spin_lock_irqsave(&drv->lock, irq_flags);
atomic64_set(&vgdev->fence_drv.last_seq, last_seq);
list_for_each_entry_safe(fence, tmp, &drv->fences, node) {
if (last_seq < fence->seq)
continue;
dma_fence_signal_locked(&fence->f);
list_del(&fence->node);
dma_fence_put(&fence->f);
}
spin_unlock_irqrestore(&drv->lock, irq_flags);
}